diff options
Diffstat (limited to 'crypto/openssh/readpass.c')
| -rw-r--r-- | crypto/openssh/readpass.c | 188 |
1 files changed, 0 insertions, 188 deletions
diff --git a/crypto/openssh/readpass.c b/crypto/openssh/readpass.c deleted file mode 100644 index bd144c2..0000000 --- a/crypto/openssh/readpass.c +++ /dev/null @@ -1,188 +0,0 @@ -/* $OpenBSD: readpass.c,v 1.47 2006/08/03 03:34:42 deraadt Exp $ */ -/* - * Copyright (c) 2001 Markus Friedl. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#include "includes.h" - -#include <sys/types.h> -#include <sys/wait.h> - -#include <errno.h> -#include <fcntl.h> -#ifdef HAVE_PATHS_H -# include <paths.h> -#endif -#include <stdarg.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> - -#include "xmalloc.h" -#include "misc.h" -#include "pathnames.h" -#include "log.h" -#include "ssh.h" -#include "uidswap.h" - -static char * -ssh_askpass(char *askpass, const char *msg) -{ - pid_t pid; - size_t len; - char *pass; - int p[2], status, ret; - char buf[1024]; - - if (fflush(stdout) != 0) - error("ssh_askpass: fflush: %s", strerror(errno)); - if (askpass == NULL) - fatal("internal error: askpass undefined"); - if (pipe(p) < 0) { - error("ssh_askpass: pipe: %s", strerror(errno)); - return NULL; - } - if ((pid = fork()) < 0) { - error("ssh_askpass: fork: %s", strerror(errno)); - return NULL; - } - if (pid == 0) { - permanently_drop_suid(getuid()); - close(p[0]); - if (dup2(p[1], STDOUT_FILENO) < 0) - fatal("ssh_askpass: dup2: %s", strerror(errno)); - execlp(askpass, askpass, msg, (char *) 0); - fatal("ssh_askpass: exec(%s): %s", askpass, strerror(errno)); - } - close(p[1]); - - len = ret = 0; - do { - ret = read(p[0], buf + len, sizeof(buf) - 1 - len); - if (ret == -1 && errno == EINTR) - continue; - if (ret <= 0) - break; - len += ret; - } while (sizeof(buf) - 1 - len > 0); - buf[len] = '\0'; - - close(p[0]); - while (waitpid(pid, &status, 0) < 0) - if (errno != EINTR) - break; - - if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) { - memset(buf, 0, sizeof(buf)); - return NULL; - } - - buf[strcspn(buf, "\r\n")] = '\0'; - pass = xstrdup(buf); - memset(buf, 0, sizeof(buf)); - return pass; -} - -/* - * Reads a passphrase from /dev/tty with echo turned off/on. Returns the - * passphrase (allocated with xmalloc). Exits if EOF is encountered. If - * RP_ALLOW_STDIN is set, the passphrase will be read from stdin if no - * tty is available - */ -char * -read_passphrase(const char *prompt, int flags) -{ - char *askpass = NULL, *ret, buf[1024]; - int rppflags, use_askpass = 0, ttyfd; - - rppflags = (flags & RP_ECHO) ? RPP_ECHO_ON : RPP_ECHO_OFF; - if (flags & RP_USE_ASKPASS) - use_askpass = 1; - else if (flags & RP_ALLOW_STDIN) { - if (!isatty(STDIN_FILENO)) { - debug("read_passphrase: stdin is not a tty"); - use_askpass = 1; - } - } else { - rppflags |= RPP_REQUIRE_TTY; - ttyfd = open(_PATH_TTY, O_RDWR); - if (ttyfd >= 0) - close(ttyfd); - else { - debug("read_passphrase: can't open %s: %s", _PATH_TTY, - strerror(errno)); - use_askpass = 1; - } - } - - if ((flags & RP_USE_ASKPASS) && getenv("DISPLAY") == NULL) - return (flags & RP_ALLOW_EOF) ? NULL : xstrdup(""); - - if (use_askpass && getenv("DISPLAY")) { - if (getenv(SSH_ASKPASS_ENV)) - askpass = getenv(SSH_ASKPASS_ENV); - else - askpass = _PATH_SSH_ASKPASS_DEFAULT; - if ((ret = ssh_askpass(askpass, prompt)) == NULL) - if (!(flags & RP_ALLOW_EOF)) - return xstrdup(""); - return ret; - } - - if (readpassphrase(prompt, buf, sizeof buf, rppflags) == NULL) { - if (flags & RP_ALLOW_EOF) - return NULL; - return xstrdup(""); - } - - ret = xstrdup(buf); - memset(buf, 'x', sizeof buf); - return ret; -} - -int -ask_permission(const char *fmt, ...) -{ - va_list args; - char *p, prompt[1024]; - int allowed = 0; - - va_start(args, fmt); - vsnprintf(prompt, sizeof(prompt), fmt, args); - va_end(args); - - p = read_passphrase(prompt, RP_USE_ASKPASS|RP_ALLOW_EOF); - if (p != NULL) { - /* - * Accept empty responses and responses consisting - * of the word "yes" as affirmative. - */ - if (*p == '\0' || *p == '\n' || - strcasecmp(p, "yes") == 0) - allowed = 1; - xfree(p); - } - - return (allowed); -} |
